package com.sky.handler;

import com.sky.constant.MessageConstant;
import com.sky.exception.BaseException;
import com.sky.result.Result;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;

import java.sql.SQLIntegrityConstraintViolationException;

/**
 * 全局异常处理器，处理项目中抛出的业务异常
 */
@RestControllerAdvice
@Slf4j
public class GlobalExceptionHandler {

    /**
     * 捕获业务异常
     * @param ex
     * @return
     */
    @ExceptionHandler
    public Result exceptionHandler(BaseException ex){
        ex.printStackTrace();
        log.error("异常信息：{}", ex.getMessage());
        return Result.error(ex.getMessage());
    }


    /**
     * 捕捉数据库唯一约束异常
     * @param e
     * @return
     */
    @ExceptionHandler
    public Result handleSQLIntegrityConstraintViolationException(SQLIntegrityConstraintViolationException e){
        e.printStackTrace();

        // Duplicate entry 'lisi' for key 'employee.idx_username'
        //1. 使用异常对象获取异常的信息
        String message = e.getMessage();

        if(message.contains("Duplicate entry")){
            //2. 截取重复的内容  'lisi'
            String val = message.split(" ")[2];

            return Result.error(val + MessageConstant.ALREADY_EXIST);
        }

        return Result.error(MessageConstant.UNKNOWN_ERROR);
    }
}
